feat(coderd): add endpoint to list provisioner daemons (#16028)

Updates #15190
Updates #15084
Supersedes #15940

coderd/coderd.go

@@ -1007,6 +1007,9 @@ func New(options *Options) *API {
 						})
 					})
 				})
+				r.Route("/provisionerdaemons", func(r chi.Router) {
+					r.Get("/", api.provisionerDaemons)
+				})
 			})
 		})
 		r.Route("/templates", func(r chi.Router) {